HTTPCLIENT 下载文件 GET 先登录 下载 退出

public int getConfig(String configName) throws MOConfigException {
  /*
   * telnet prompt is based on sysName, making sure snmp opeded in order
   * to get sysName
   */
  // down load config file

  //登陆服务器  采用的是POST
  String url = "http://"+this._ip+"/setup.cgi";
  NameValuePair[] data_login = { new NameValuePair("ID", "11"),
    new NameValuePair("mtg", "0"),
    new NameValuePair("haveCookie", "0"),
    new NameValuePair("backID", "30"),
    new NameValuePair("psw", this._mo.getHttpPass()) };
  HTTPPostMethod upm = new HTTPPostMethod();
  try {
   String ss = upm.postMethod(url, data_login);
   if (ss.indexOf("Another user is already logged on") != -1) {
    //System.out.println("Another user is already logged on");
    throw new MOConfigException("Failed to get configuration file.");
   }
   if (ss.indexOf("Wrong password.") != -1) {
    //System.out.println("Wrong password.");
    throw new MOConfigException("Failed to get configuration file.");
   }
  } catch (IOException e) {
    e.printStackTrace();
  }
  
  
  //get方法下载文件
  String urlget = "http://"+this._ip+"/txtcfg.cgi?config.txt";
  HTTPGetMethod ugm = new HTTPGetMethod();
  
  String ss = null;
  try {
   ss = ugm.getMethod(urlget);
  } catch (IOException e) {
   throw new MOConfigException("Failed to get configuration file.");
  }
  try {
   String templateFilename = ApplicationEnv.PATH_CONFIG_DOWNLOAD
     + File.separator + configName;
   FileWriter file = new FileWriter(templateFilename);
   BufferedWriter buff = new BufferedWriter(file);
   file.write(ss, 0, ss.length());
   buff.close();
   file.close();
  } catch (IOException e) {
   throw new MOConfigException("Failed to get configuration file.");
  }
  LogServer.getLogger().debug("G610Config::getConfig() - start. logout");
  //退出
  NameValuePair[] data_exit = { new NameValuePair("ID", "12"),
    new NameValuePair("mtg", "0"),
    new NameValuePair("haveCookie", "0"),
    new NameValuePair("referer", "100"),
    new NameValuePair("systmSecs", "118041551"),
    new NameValuePair("systmZ", "25") };
  try {
   upm.httpParser(upm.postMethod(url, data_exit));
  } catch (IOException e) {
   throw new MOConfigException("Failed to get configuration file.");
  }
  return 0;
  
 } 

 

//post方法

 public String postMethod(String url, NameValuePair[] data)
   throws IOException {
  PostMethod postMethod = new PostMethod(url);
  // 将表单的值放入postMethod中
  postMethod.setRequestBody(data);
  // 执行postMethod
  int statusCode = 0;
  byte[] responseBody = null;
  try {
   statusCode = _httpClient.executeMethod(postMethod);
  } catch (HttpException e) {
   e.printStackTrace();
  } catch (IOException e) {
   e.printStackTrace();
  }
  // HttpClient对于要求接受后继服务的请求，象POST和PUT等不能自动处理转发
  // 301或者302
  if (statusCode == HttpStatus.SC_MOVED_PERMANENTLY
    || statusCode == HttpStatus.SC_MOVED_TEMPORARILY) {
   Header locationHeader = postMethod.getResponseHeader("location");
   String location = null;
   if (locationHeader != null) {
    location = locationHeader.getValue();
    return "G610_PAGE_WARNING:The page was redirected to:"
      + location;
   } else {
    return "G610_PAGE_WARNING:Location field value is null.";
   }
  } else {
   // System.out.println(postMethod.getStatusLine());
   InputStream is = postMethod.getResponseBodyAsStream();
   if (is != null) {
    long contentLength = postMethod.getResponseContentLength();
    if ((contentLength != -1) && (contentLength > PAGE_MAX_LEN)) {
     throw new HttpContentTooLargeException("Content-Length is "
       + contentLength, PAGE_MAX_LEN);
    }
    ByteArrayOutputStream rawdata = new ByteArrayOutputStream(
      contentLength > 0 ? (int) contentLength : 4 * 1024);
    byte[] buffer = new byte[2048];
    int pos = 0;
    int len;
    do {
     len = is.read(buffer, 0, Math.min(buffer.length,
       PAGE_MAX_LEN - pos));
     if (len == -1)
      break;
     rawdata.write(buffer, 0, len);
     pos += len;
    } while (pos < PAGE_MAX_LEN);

    // check if there is even more data
    if (pos == PAGE_MAX_LEN) {
     if (is.read() != -1)
      throw new HttpContentTooLargeException(
        "Content-Length not known but larger than "
          + PAGE_MAX_LEN, PAGE_MAX_LEN);
    }
    responseBody = rawdata.toByteArray();
   }
  }
  postMethod.releaseConnection();
  return EncodingUtil.getString(responseBody, postMethod
    .getResponseCharSet());
 }

 

//get方法

 public String getMethod(String url )
   throws IOException {
  GetMethod getMethod = new GetMethod(url);
  int statusCode = 0;
  byte[] responseBody = null;
  try {
   statusCode = _httpClient.executeMethod(getMethod);
  } catch (HttpException e) {
   e.printStackTrace();
  } catch (IOException e) {
   e.printStackTrace();
  }
  if (statusCode == HttpStatus.SC_MOVED_PERMANENTLY
    || statusCode == HttpStatus.SC_MOVED_TEMPORARILY) {
   Header locationHeader = getMethod.getResponseHeader("location");
   String location = null;
   if (locationHeader != null) {
    location = locationHeader.getValue();
    return "G610_PAGE_WARNING:The page was redirected to:"
      + location;
   } else {
    return "G610_PAGE_WARNING:Location field value is null.";
   }
  } else {
   // System.out.println(getMethod.getStatusLine());
   InputStream is = getMethod.getResponseBodyAsStream();
   if (is != null) {
    long contentLength = getMethod.getResponseContentLength();
    if ((contentLength != -1) && (contentLength > PAGE_MAX_LEN)) {
     throw new HttpContentTooLargeException("Content-Length is "
       + contentLength, PAGE_MAX_LEN);
    }
    ByteArrayOutputStream rawdata = new ByteArrayOutputStream(
      contentLength > 0 ? (int) contentLength : 4 * 1024);
    byte[] buffer = new byte[2048];
    int pos = 0;
    int len;
    do {
     len = is.read(buffer, 0, Math.min(buffer.length,
       PAGE_MAX_LEN - pos));
     if (len == -1)
      break;
     rawdata.write(buffer, 0, len);
     pos += len;
    } while (pos < PAGE_MAX_LEN);

    // check if there is even more data
    if (pos == PAGE_MAX_LEN) {
     if (is.read() != -1)
      throw new HttpContentTooLargeException(
        "Content-Length not known but larger than "
          + PAGE_MAX_LEN, PAGE_MAX_LEN);
    }
    responseBody = rawdata.toByteArray();
   }
  }
  getMethod.releaseConnection();
  return EncodingUtil.getString(responseBody, getMethod
    .getResponseCharSet());
 }